Should I buy Ethereum or DOGE?

Hello, I'm quite new to the world of cryptocurrency, and I've been hearing a lot about Ethereum and DOGE. Could you please help me decide which one to invest in? I've heard that Ethereum is a platform for smart contracts and decentralized applications, while DOGE is more of a meme coin with a large community. But I'm not sure which one has more potential for growth in the long run. Could you provide some insights into their fundamentals, use cases, and perhaps some predictions for their future? Also, are there any risks involved that I should be aware of? Thank you in advance for your help!